Piezoelectric sensor



FIG. 1 is a perspective view of a piezoelectric sensor showing the top, front and right sides of our new design; and,

FIG. 2 is a perspective view of the piezoelectric sensor showing the bottom, rear and left sides thereof.

The grid lines shown in FIGS. 1 and 2 represent surface texture lines. 

The ornamental design for a piezoelectric sensor, as shown and described. 